As I returned home this evening I saw that one of the ladybird pupae adorning the inside of my porch had spawned a fresh ladybird, with translucent orange wing cases and just the merest hint of spots. A number of hours later it was looking more typically ladybird-like. I assume it is a Harlequin, owing to the big black 'M' on its head and the orange legs. That's the early and later photos above, with the empty pupae case on the right.